Carpenter&#39;s tool.



J. E. MCDERMETT.

CARPENTERS TOOL.

APPLICATION FILED JUNE 5,19I-1.

,2% 289. Patented Feb.11,1919.

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J. E. MCDERMETT.

CARPENTERS TOOL.

APPLICATION FILED luNE 5.1911.

Patented Feb. l1, 1919.

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JIM: E. MUDERMETT, 0F SWENSON, TEXAS.

GARPENTERS TOOL.

Specification of Letters Patent.

Patented Feb. 11, 1919.

Application led .Tune 5, 1917. Serial No. 172,983.

To all lwhom it may concern:

Be it known that I, JIM E. MCDERMETT, a citizen of the United States, residing at Swenson, in the county of Stonewall and State of Texas, have invented new and useful Improvements in Carpenters Tools, of which the following is a specification.

This invention comprehends the provision of an adjustable pattern designed for use by carpenters in determining the exact size and configuration of the space in which a stair tread or riser is adapted to be iitted, so that the material from which the tread or riser is taken, may be properly marked olf for cutting with regard to the desired length and angularity at the ends of said parts. Although the device is especially intended for the purpose mentioned, it can be used in other various capacities, such as, in marking oli material for the cutting of base boards, rafters, shelving, etc.

The invention aims to provide a device of the above mentioned character which is simple in construction, susceptible of being quickly and easily adjusted to accommodate itself to different angles, and also capable of being folded to provide a compact article when its use is not desired.

The nature and advantages of the invention will be better understood when the following detail description is read in connection with the accompanying drawings, the invention residing in the construction, combination and arrangement of parts as claimed.

In the drawings forming part of this application like numerals of reference indicate similar parts in the several views and wherein Figure 1 is a front elevation of the device showing one position of the parts.

Fig. 2 is a rear elevation showing the component parts in a different adjusted position.

Fig. 3 is a sectional view on line 3-3 of Fig. 1.

Fig. 4 is a sectional view taken on line H of Fig. 1.

Fig. 5 is a plan view showing the device folded.

Fig. 6 is a cross sectional view taken on the line 6 6 of Fig. 1.

The device forming the subject matter of my invention embodies a cross bar indicated generally at A and consists of two sections 10 and 11 respectively. The sections are disposed in the same plane, being arranged end to end, while each section at the rear side is formed with a longitudinally extending groove 13, which groove opens at the adjacent extremities of the respective sections. Received within the grooves 13 and bridging the joint between the respective sections of the bar, is an intermediate section 14. Upon inspection of Fig. 3 of the drawings it will be noted that the grooves 13 are of substantially channel-like formation, while the section 14 is formed with a relatively wide base 15 which is disposed beneath the flanges 16 delined by the grooves 13 of the sections 10 and 11, and consequently these parts are interfitted for relative sliding adjustment and are maintained properly associated. Due to this construction and arrangement of parts, it is obvious that the bar A can be readily and easily increased or decreased any length as the occasion may require, and when the proper length has been obtained, the sections 10 and 11 are held fixed relatively and also with respect to the section 14:, through the instrumentality of thumb screws 17 carried by the sections 10 and 11 and adapted to engage the intermediate section 14 as shown. Each of the sections 10 and 11 respectively, is provided with a longitudinally extending slot 18 disposed in parallelism with the groove 13, the slot extending throughout the major portion of the length of its respective section. The rear side of each section is also provided witha groove 19 with which the slot 18 communicates. Arranged to slide within the slot 18 of each section is va thumb screw 20 carried by one extremity of a brace 21, the opposite extremity of the latter being secured to an arm 22 associated with said section of the bar for swinging movement. Fitted between the opposed walls of the oove 19 of each section, is a nut 23 with which the thumb screw 20 is associated, so 100 YEl) that when the arm 22 has been adjusted to the desired position, the thumb screw is rotated in the proper direction to maintain the arm against further adjustment, the thumbv screw 20 and nut 23 cooperating for this purpose as will be readily understood. Of course, as the nut 23 is associated with the thumb screw 20, these parts slide within the slot 18 as a unit, but by reason of the fact that the nut is fitted between the opposed walls of the groove 19, turning of the nut with the thumb screw is obviated.

The arms 22 are connected with their respective sections through the instrumentality of links 2aand 25, these links projecting-from the opposite sides of each arm and embracing the adjacent end of its respective section, the links being associated with the latter by means of a threaded bolt 26 which passes through said section, and the slots ofthe links 24 and 25, a nut 27 being associated with the bolt to prevent casual separation of the latter from said section. This construction and arrangement manifestly provides for the swinging of the arms 22 toward and away from each other to assume different angular positions with respect to their associated section, each arm and the adjacent section being beveled as shown to also permit of the adjustment of said arm in the manner stated.

The link 24: of each arm is slightly longer than the link 25 thereof, and passing through the slot in the link 2e in addition to the bolt 26 is a bolt 28. The additional length of the link 24E is necessitated by the provision of this bolt in order that the slot inthe link 2st will extend beyond the bolt 28 as iar as the slot in the link 25 extends beyond the bolt 26. The bolt 28 is received within an arcuate -shaped groove 29 formed in each section 1() and 11, while positioned within each groove 29 is the head 3() of the bolt 28.

A nut is threaded upon the bolt 2S to assist in holding theV arm 22 'in a olded'position when use of the device 4is not desired. By reason vof the provision of the slot 29, coupled with -the'act that the outer ends of the respective sections are beveled, it is manifest that by loosening the bolt 28, the arms 22 can be swung inwardly and arranged against lone edge ot its respective sectionin parallel 'ism therewith. During this adjustment of "the arm, the bolt 28 is moved toward one end ofthe groove 29, and subsequent to the Jfolding of the arms in the manner shown in Fig.

5, thel nuts on `the bolt-s 28 are tightened, to

y hold the Varms `tired in their folded position.

'In this mannera very compact device may be produced to occupy but a minimum of space in a toolbox or the like.

Y 1n practice, the bar A is arranged within the space to receive the said tread or riser, with a View to determining the size and con- Y upon a board or other material, whereby the said board or material may be properly marked o to indicate the lines upon which the material must be cut the production of the Vtread 0r riser. It is of course to be understood that the device is adapted for use in various capacities forY the marking Sott of material for the production of articles of diierent characters, such as base boards, shelving or the like.

While it is believed -that from the fore'- going description the nature and advantages of the invention will `be readily apparent, 1 desire to have it understood that what yis herein shown and Vdescribed constitutes the preferred embodiment of the' inventionto which I do not limit myself, and that such changes may be `resorted kto when desired as fall within the scope of what is claimed.

What is claimed is-;-

1. A device of the character described comprising a bar, a pair of links piv-` otally and slidably connected with each of thev ends of said bar, an arm pivotally connected between each pair of links, anda f brace pivotally connected with eacharmand slidably and pivotally connected-'with -said bar. .f

2. A. devicey of the character described comprising a bar made up cfa plurality of relatively slidablesections to var-y the length of the bar, means forL holding said sections fixed relatively in their adjusted position,

arms connected with `the opposite ends of the bar to assume ditferent angular positions with respect thereto, ya brace pivoted upon each arm and longitudinally and slidably adjustable in relation to the adjaeentwsec-A tion of the bar, and means for preventing movement of the brace with respect to said section whereby said armis held fixed in adjusted position.

3. A device of the/"character :described i comprising a bar, having its ends'V cutV at an incline to its length, a pair of links slidably and pivotally connected with each end of said bar, an arm pivotally connected between each pair of links, and a brace rpvotally connected with each arm and slidably` connected with said bar, the end of ysaid arm adjacent said Vbar being cut at an inclination to its length to coperatively engage with the inclined end of said bar whereby said rm Will extend at a, deinite angle to Said 4. A device of the character described comprising a bar, a pair of slotted links disposed upon opposite sides of each end thereof, a bolt extending through said bar and through said slotted links, said bar being provided With an ereuete slot concentric with said bolt, and an adjusting bolt ex- 10 tending through saJid arcuate slot and through the slot in one of the links, an arm pivotally connected to and extending between said links, rand a brace pivotally connected with said erm and slidably connected 15 with seid bar.

In testimony whereof I aix my signature.

JIM E. MCDERMETT.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. c." 

